84 BULLETIN 50, UNITED STATES NATIONAL MUSEUM. 
Winter plumage.—Without black on sides of head or under parts, 
which are pale brownish gray, passing into white on under tail- 
coverts, the foreneck and chest more or less spotted or mottled with 
darker; speckling on upper parts mostly grayish white, the yellow 
chiefly confined to rump and upper tail-coverts; no pure white on 
forehead, superciliary region, or sides of neck; otherwise like summer 
plumage. 
Young.—Similar to winter adults, but upper parts more generally 
and conspicuously spotted with yellow. 
Downy young.—Upper parts buffy yellow (colonial buff, more or 
less deep), irregularly mottled with black; a band across nape, sides 
of head, and under parts dull white, the breast tinged with pale 
brownish gray; forehead buffy white with a median streak of black; 
a black loral streak and above this a spot of black; a narrow streak 
from rictus to beneath auricular region, becoming broader posteriorly. 
Adult male.—Wing, 159-183.5 (176.4); tail, 60-75 (67.9); culmen, 
20.5-24 (22.2); tarsus, 38.5-45 (41.9); middle toe, 21-24.5 (22.9).% 
Adult female.—Wing, 176-183 (180.8); tail, 64-70 (66); culmen, 
22-23.5 (22.5); tarsus, 41-44.5 (43); middle toe, 23-25 (23.9).° 
Breeding along or near Arctic coast of North America, from Point 
Barrow, northern Alaska, ‘‘to mouth of Mackenzie River, and from 
Melville Island, Wellington Channel, and Melville Peninsula south 
to northwestern [shores of] Hudson Bay;’’* winters in southern 
South America, on open plains of Brazil, Argentina, Paraguay (Gran 
Chaco; upper Rio Parana), Uruguay (Montevidéo; Bahia Blanca: 
Sierra de la Ventura), and Bolivia (Aguairenda; San Francisco); 
migrates southward from Nova Scotia, New Brunswick, etc., over 
Atlantic Ocean via West Indies and Bermuda (a few only going 
south by way of the interior); returning northward through the 
Mississippi Valley via the continental land area. 
@ Eleven specimens. o Six specimens. 
Locality. Wing. | Tail. Soe Tarsus. ea 
MALES, 
‘One adult male from Hudson Bay (Cape Eskimo)............. 177 69 21.5 38.5 22 
‘Two adult males from Illinois (migrants)...................... 179. 5 68.7 22.7 41.2 23 
‘One adult male from Mackenzie (Fort Simpson)............... 180 72 23 45 23 
Seven adult males from northern Alaska (Point Barrow)...... 174.9 67 22.1 42.1 22.9 
‘Twenty-three adult males of P. d. fulvus.........22..0002.0005. 165.9 63.6 23.4 42.9 23.1 
leven adult males of P. apricarius.............2020cceeceeeeee 180.5 | 74.4] 22.5) 40.5 25.1 
FEMALES, 
Your adult females from Mackenzie (Fort Simpson)........... ‘| 179 66. 4 22.6 42.4 23.7 
‘T'wo adult females from northern, Alaska (Point Barrow)...... 184.5 65. 2 22. 2 44.2 24.2 
Eleven adult females of P. d. fulous...........ccccccncceceeccee 167. 2 62.5 23. 2 43. 3. 24.1 
Four adult females of P. apricarius...........0..0cccccceeeeccce 180. 2 71.7 22, 4 39.5 24.7 
¢ American Ornithologists’ Union Check List, 3d ed., 1910, 127. 
